This project is neat and OP did a good job, but I think the interest in Geiger counters among hackers needs an update. The Geiger kit on Adafruit (Yes, I know that makes the cost a lot higher to be from them instead of Ali, but I think is a good baseline for "finished good" price) is $99.
Meanwhile, Raysid or Radiacode let you do full on gamma spectrometry, for about 2.5x the price.
And, like, yeah, 2.5x the price. I'm not oblivious to that being significant, but to me it's sorta like an GT1030 with DDR4 - it's about $100 or you could get an RTX 3060 for a bit over $300. Like, you might have a use where you ONLY need a cheap display card, but there's a reason LTT calls the 1030 eWaste from the factory. Similarly, you might get enough out of the Geiger or it might do something the Radiacode doesn't for you but for most hobbyist, I doubt it.
whytevuhuni · 2m ago
I wonder if a device with worse RAM can measure radiation by checking how many of its own bits are being randomly flipped.
Coding a program that could self-heal and survive in such a situation would be fun.
I know that footguns are broadly "on-brand" for the flipper zero ecosystem, but exposing high-voltage leads like that without any warning whatsoever seems a bit much.
JohnFen · 39m ago
I don't know about the details of this device, but in general, simply being high-voltage doesn't automatically mean it's dangerous. One of the machines I work with in my day job has probes that put out around a thousand volts, but it's totally safe to touch them with your bare hands. You won't even feel a tingle.
That said, it's always prudent to treat any live electrical line as dangerous unless you know for a fact that it isn't, of course.
ooterness · 53m ago
Geiger counter with built-in taser. It's a feature, not a bug.
wellthisisgreat · 41m ago
Fallout vibes
CamperBob2 · 1m ago
About the same voltage as a carpet shock.
superxpro12 · 1h ago
Is there a schematic? How high we talkin?
colechristensen · 56m ago
Hundreds of volts
leshenka · 38m ago
but how many amps though?
hgomersall · 28m ago
How many is safe? I don't mean that facetiously - do you have a good understanding of a safe power limit on a source at hundreds of volts?
vlovich123 · 14m ago
Depends on the specific conditions but less than 2mA for AC should only be a tingle and closer to 5mA for DC will be a slight tingling.
JohnFen · 1m ago
> less than 2mA for AC should only be a tingle
Yep, and even with AC, it depends on the frequency. There are a ton of variables affecting how dangerous electricity is to people, so it's hard to make general statements about it.
ge96 · 36m ago
There is a subreddit where people measure the radiation given off by random things you'll see them pointing some device at the ground or an object.
Like an old glass cup
joahnn_s · 37m ago
We need the iconic sound of the geiger counter
jasonfrost · 1h ago
Really neat. It'd pair well with an alarm the user can set at the appropriate turn back dose for custom doses and concerning dose rates
morninglight · 32m ago
Do a search for "MightyOhm Geiger Counter Kit Bundle" and you will find a stand alone version of the same circuit along with photos. Although the PCB has a "High Voltage" label, it is powered by 2 X AAA batteries which are might be very lethal if ingested.\s
Meanwhile, Raysid or Radiacode let you do full on gamma spectrometry, for about 2.5x the price.
And, like, yeah, 2.5x the price. I'm not oblivious to that being significant, but to me it's sorta like an GT1030 with DDR4 - it's about $100 or you could get an RTX 3060 for a bit over $300. Like, you might have a use where you ONLY need a cheap display card, but there's a reason LTT calls the 1030 eWaste from the factory. Similarly, you might get enough out of the Geiger or it might do something the Radiacode doesn't for you but for most hobbyist, I doubt it.
Coding a program that could self-heal and survive in such a situation would be fun.
That said, it's always prudent to treat any live electrical line as dangerous unless you know for a fact that it isn't, of course.
Yep, and even with AC, it depends on the frequency. There are a ton of variables affecting how dangerous electricity is to people, so it's hard to make general statements about it.
Like an old glass cup
https://mightyohm.com/files/geiger/images/6275026497_3cf9f17...